270-284 WINCHESTER
The following data was developed in a rifle built on a Hall BR action. It has a Shilen stainless steel heavy, fluted barrel, 25 inches long, with a 10-inch twist. A Leupold 24X BR scope was installed in Jewel rings and Kelbly bases. The chamber was cut with a tight neck reamer of 0.300.
We used Winchester 284 brass and the Federal 210M primers. All bullets were molly coated, and all groups are 5 shots at 100 yards.
|
POWDER |
VELOCITY |
GROUP |
BULLET |
|
60.0 VVN 560 |
3196 |
0.399 |
SIERRA 90 HP |
|
61.0 |
3243 |
0.504 |
|
|
62.0 |
3322 |
0.513 |
|
|
63.0 |
3465 |
0.567 |
|
|
64.0 |
3515 |
0.566 |
|
|
65.0 |
3673 |
0.457 |
|
|
58.0 H 414 |
3452 |
0.564 |
|
|
59.0 |
3519 |
0.346 |
|
|
60.0 |
3628 |
0.452 |
|
|
61.0 |
3689 |
0.640 |
|
|
55.0 WMR |
2756 |
0.365 |
NOSLER 130 BALLISTIC TIP |
|
56.0 |
2814 |
0.247 |
|
|
57.0 |
2856 |
0.291 |
|
|
58.0 |
2905 |
0.567 |
|
|
59.0 |
2975 |
0.597 |
|
|
60.0 |
3017 |
0.584 |
|
|
61.0 |
3093 |
0.515 |
|
|
62.0 |
3135 |
0.426 |
|
|
63.0 |
3173 |
0.559 |
|
|
59.0 RELOADER 22 |
3022 |
0.567 |
|
|
60.0 |
3088 |
0.381 |
|
|
61.0 |
3156 |
0.564 |
|
|
62.0 |
3218 |
0.652 |
|
|
57.0 H 4831 |
2858 |
0.430 |
SIERRA 135 MATCH KING |
|
58.0 |
2921 |
0.200 |
|
|
59.0 |
2987 |
0.239 |
|
|
60.0 |
3044 |
0.518 |
|
|
57.0 H 450 |
3037 |
0.325 |
|
|
58.0 |
3070 |
0.521 |
|
|
59.0 |
3113 |
0.661 |
|
|
60.0 |
3175 |
0.412 |
NOSLER 140 BALLISTIC TIP |
|
57.0 RELOADER 22 |
2864 |
0.381 |
|
|
58.0 |
2929 |
0.702 |
|
|
59.0 |
3001 |
0.435 |
|
|
60.0 |
3047 |
0.487 |
|
|
55.0 VVN 560 |
2823 |
0.211 |
|
|
56.0 |
2844 |
0.264 |
|
|
57.0 |
2953 |
0.589 |
|
|
58.0 |
3012 |
0.269 |
|
|
59.0 |
3078 |
0.403 |
|
|
60.0 |
3125 |
0.390 |
|
|
61.0 |
3200 |
0.288 |
|
|
56.0 H 4831 |
2798 |
0.452 |
NOSLER 150 BALLISTIC TIP |
|
57.0 |
2845 |
0.363 |
|
|
58.0 WMR |
2894 |
0.242 |
|
|
59.0 |
2952 |
0.349 |
|
|
60.0 |
2993 |
0.489 |
|
|
61.0 |
3061 |
0.268 |
|
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